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21 LAKE DR, ROUND ROCK, TX 78665

ROUND ROCK, 78665 — williamson County

3 bed2 bath1,938 sqftBuilt 1986

Property at a Glance

This home is estimated between $214,123 and $323,295, with a best estimate of $301,041. That places the property below the R425589E - Round Rock Glenn median of $878,798, in a neighborhood that appreciated 5.3% over the past year.

Estimated Value Range

$214,123 $323,295
Best Estimate
$301,041
WCAD Value
$716,068
Low Confidence

Based on 5 comparable properties(0 in the same subdivision)

There are 5 comparable properties within range, but none are in R425589E - Round Rock Glenn. The estimated range of $214,123 and $323,295 should be treated as a rough guide.

Comparable Properties (5)

4 bed 2 bath 1,929 sqft Built 1997
Raw Value $365,524
Adjusted Value $306,295

Adjusted +$3,372 for 9 sqft more living space and -$62,601 for being older. Net adjustment: -$59,229.

3 bed 2 bath 1,840 sqft Built 2007
Raw Value $406,093
Adjusted Value $323,295

Adjusted +$36,714 for 98 sqft more living space and -$119,512 for being older. Net adjustment: -$82,798.

3 bed 2 bath 1,775 sqft Built 2010
Raw Value $376,561
Adjusted Value $301,041

Adjusted +$61,065 for 163 sqft more living space and -$136,585 for being older. Net adjustment: -$75,520.

3 bed 2 bath 1,855 sqft Built 2015
Raw Value $348,069
Adjusted Value $214,123

Adjusted +$31,094 for 83 sqft more living space and -$165,040 for being older. Net adjustment: -$133,946.

3 bed 2 bath 1,845 sqft Built 2015
Raw Value $346,483
Adjusted Value $216,284

Adjusted +$34,841 for 93 sqft more living space and -$165,040 for being older. Net adjustment: -$130,199.

The Neighborhood

This home is valued 18.5% below the R425589E - Round Rock Glenn median of $878,798. That positions it competitively for buyers comparing within the neighborhood. The neighborhood appreciated 5.3% over the past year.

R425589E - Round Rock Glenn

below average
17 Properties
$878,798 Median Value
+5.3% YoY Change
0% Have Pool
41% Have Garage
This Home
$716,068
Median
$878,798

This home is -18.5% below the subdivision median.

Tax Analysis

The estimated annual property tax is $10,936 across all districts. With a homestead exemption claimed, that drops to $9,553 — saving $1,383 per year. That's $796 per month a buyer should budget. The assessed value increased roughly in line with the neighborhood, so a tax protest is unlikely to yield significant savings.

Tax Districts

DistrictTypeRateAnnual Amount
Round Rock ISDSchool0.8931%$6,395
Williamson CountyCounty0.3694%$2,645
Austin Community Collegespecial0.1034%$740
Williamson County ESD #9 - Round RockESD0.0999%$715
Williamson County FM/RdCounty0.0443%$317
Upper Brushy Creek WCIDWater0.0170%$122
Williamson Central Appraisal Districtcad0.0000%$0
Total Annual Tax1.5272%$10,936

Mortgage Context

At today's 30-year mortgage rate of 6.38%, a buyer financing $301,041 would pay approximately $1,879 per month (principal and interest only, excluding taxes and insurance).

Data sourced from Williamson County Appraisal District (WCAD), Texas Education Agency (TEA), and Federal Reserve Economic Data (FRED). Assessment values reflect the appraisal district's estimate, not market sale prices. Report generated 4/18/2026.

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